LsstCamSimTranslator

class lsst.obs.lsst.translators.LsstCamSimTranslator(header: Mapping[str, Any], filename: str | None = None)

Bases: LsstCamTranslator

Metadata translation for the simulated LSST Camera.

Attributes Summary

all_properties	All the valid properties for this translator including extensions.
cameraPolicyFile	Path to policy file relative to obs_lsst root.
detectorMapping	Mapping of detector name to detector number and serial.
detectorSerials	Mapping of detector serial number to raft, number, and name.
name	Name of this translation class

Methods Summary

can_translate(header[, filename])	Indicate whether this translation class can translate the supplied header.
fix_header(header, instrument, obsid[, filename])	Fix Simulated LSSTCamSim headers.
observing_date_to_offset(observing_date)	Return the offset to use when calculating the observing day.
to_altaz_end()	Return the AltAz for the end of the observation.
to_has_simulated_content()	Boolean indicating whether any part of this observation was simulated.
to_instrument()	The instrument used to observe the exposure.

Attributes Documentation

all_properties: dict[str, PropertyDefinition] = {'altaz_begin': PropertyDefinition(doc='Telescope boresight azimuth and elevation at start of observation.', str_type='astropy.coordinates.AltAz', py_type=<class 'astropy.coordinates.builtin_frames.altaz.AltAz'>, to_simple=<function altaz_to_simple>, from_simple=<function simple_to_altaz>), 'altaz_end': PropertyDefinition(doc='Telescope boresight azimuth and elevation at end of observation.', str_type='astropy.coordinates.AltAz', py_type=<class 'astropy.coordinates.builtin_frames.altaz.AltAz'>, to_simple=<function altaz_to_simple>, from_simple=<function simple_to_altaz>), 'boresight_airmass': PropertyDefinition(doc='Airmass of the boresight of the telescope.', str_type='float', py_type=<class 'float'>, to_simple=None, from_simple=None), 'boresight_rotation_angle': PropertyDefinition(doc='Angle of the instrument in boresight_rotation_coord frame.', str_type='astropy.coordinates.Angle', py_type=<class 'astropy.coordinates.angles.core.Angle'>, to_simple=<function angle_to_simple>, from_simple=<function simple_to_angle>), 'boresight_rotation_coord': PropertyDefinition(doc='Coordinate frame of the instrument rotation angle (options: sky, unknown).', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'can_see_sky': PropertyDefinition(doc='True if the observation is looking at sky, False if it is definitely not looking at the sky. None indicates that it is not known whether sky could be seen.', str_type='bool', py_type=<class 'bool'>, to_simple=None, from_simple=None), 'dark_time': PropertyDefinition(doc='Duration of the exposure with shutter closed (seconds).', str_type='astropy.units.Quantity', py_type=<class 'astropy.units.quantity.Quantity'>, to_simple=<function exptime_to_simple>, from_simple=<function simple_to_exptime>), 'datetime_begin': PropertyDefinition(doc='Time of the start of the observation.', str_type='astropy.time.Time', py_type=<class 'astropy.time.core.Time'>, to_simple=<function datetime_to_simple>, from_simple=<function simple_to_datetime>), 'datetime_end': PropertyDefinition(doc='Time of the end of the observation.', str_type='astropy.time.Time', py_type=<class 'astropy.time.core.Time'>, to_simple=<function datetime_to_simple>, from_simple=<function simple_to_datetime>), 'detector_exposure_id': PropertyDefinition(doc='Unique integer identifier for this detector in this exposure.', str_type='int', py_type=<class 'int'>, to_simple=None, from_simple=None), 'detector_group': PropertyDefinition(doc='Collection name of which this detector is a part. Can be None if there are no detector groupings.', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'detector_name': PropertyDefinition(doc='Name of the detector within the instrument (might not be unique if there are detector groups).', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'detector_num': PropertyDefinition(doc='Unique (for instrument) integer identifier for the sensor.', str_type='int', py_type=<class 'int'>, to_simple=None, from_simple=None), 'detector_serial': PropertyDefinition(doc='Serial number/string associated with this detector.', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'detector_unique_name': PropertyDefinition(doc='Unique name of the detector within the focal plane, generally combining detector_group with detector_name.', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'exposure_group': PropertyDefinition(doc="Label to use to associate this exposure with others (can be related to 'exposure_id').", str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'exposure_id': PropertyDefinition(doc='Unique (with instrument) integer identifier for this observation.', str_type='int', py_type=<class 'int'>, to_simple=None, from_simple=None), 'exposure_time': PropertyDefinition(doc='Actual duration of the exposure (seconds).', str_type='astropy.units.Quantity', py_type=<class 'astropy.units.quantity.Quantity'>, to_simple=<function exptime_to_simple>, from_simple=<function simple_to_exptime>), 'exposure_time_requested': PropertyDefinition(doc='Requested duration of the exposure (seconds).', str_type='astropy.units.Quantity', py_type=<class 'astropy.units.quantity.Quantity'>, to_simple=<function exptime_to_simple>, from_simple=<function simple_to_exptime>), 'focus_z': PropertyDefinition(doc='Defocal distance.', str_type='astropy.units.Quantity', py_type=<class 'astropy.units.quantity.Quantity'>, to_simple=<function focusz_to_simple>, from_simple=<function simple_to_focusz>), 'group_counter_end': PropertyDefinition(doc='Observation counter for the end of the exposure group. Depending on the instrument the relevant group may be visit_id or exposure_group.', str_type='int', py_type=<class 'int'>, to_simple=None, from_simple=None), 'group_counter_start': PropertyDefinition(doc='Observation counter for the start of the exposure group.Depending on the instrument the relevant group may be visit_id or exposure_group.', str_type='int', py_type=<class 'int'>, to_simple=None, from_simple=None), 'has_simulated_content': PropertyDefinition(doc='Boolean indicating whether any part of this observation was simulated.', str_type='bool', py_type=<class 'bool'>, to_simple=None, from_simple=None), 'instrument': PropertyDefinition(doc='The instrument used to observe the exposure.', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'location': PropertyDefinition(doc='Location of the observatory.', str_type='astropy.coordinates.EarthLocation', py_type=<class 'astropy.coordinates.earth.EarthLocation'>, to_simple=<function earthlocation_to_simple>, from_simple=<function simple_to_earthlocation>), 'object': PropertyDefinition(doc='Object of interest or field name.', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'observation_counter': PropertyDefinition(doc='Counter of this observation. Can be counter within observing_day or a global counter. Likely to be observatory specific.', str_type='int', py_type=<class 'int'>, to_simple=None, from_simple=None), 'observation_id': PropertyDefinition(doc="Label uniquely identifying this observation (can be related to 'exposure_id').", str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'observation_reason': PropertyDefinition(doc="Reason this observation was taken, or its purpose ('science' and 'calibration' are common values)", str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'observation_type': PropertyDefinition(doc='Type of observation (currently: science, dark, flat, bias, focus).', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'observing_day': PropertyDefinition(doc='Integer in YYYYMMDD format corresponding to the day of observation.', str_type='int', py_type=<class 'int'>, to_simple=None, from_simple=None), 'observing_day_offset': PropertyDefinition(doc='Offset to subtract from an observation date when calculating the observing day. Conversely, the offset to add to an observing day when calculating the time span of a day.', str_type='astropy.time.TimeDelta', py_type=<class 'astropy.time.core.TimeDelta'>, to_simple=<function timedelta_to_simple>, from_simple=<function simple_to_timedelta>), 'physical_filter': PropertyDefinition(doc='The bandpass filter used for this observation.', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'pressure': PropertyDefinition(doc='Atmospheric pressure outside the dome.', str_type='astropy.units.Quantity', py_type=<class 'astropy.units.quantity.Quantity'>, to_simple=<function pressure_to_simple>, from_simple=<function simple_to_pressure>), 'relative_humidity': PropertyDefinition(doc='Relative humidity outside the dome.', str_type='float', py_type=<class 'float'>, to_simple=None, from_simple=None), 'science_program': PropertyDefinition(doc='Observing program (survey or proposal) identifier.', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'telescope': PropertyDefinition(doc='Full name of the telescope.', str_type='str', py_type=<class 'str'>, to_simple=None, from_simple=None), 'temperature': PropertyDefinition(doc='Temperature outside the dome.', str_type='astropy.units.Quantity', py_type=<class 'astropy.units.quantity.Quantity'>, to_simple=<function temperature_to_simple>, from_simple=<function simple_to_temperature>), 'tracking_radec': PropertyDefinition(doc='Requested RA/Dec to track.', str_type='astropy.coordinates.SkyCoord', py_type=<class 'astropy.coordinates.sky_coordinate.SkyCoord'>, to_simple=<function skycoord_to_simple>, from_simple=<function simple_to_skycoord>), 'visit_id': PropertyDefinition(doc='ID of the Visit this Exposure is associated with.\n\nScience observations should essentially always be\nassociated with a visit, but calibration observations\nmay not be.', str_type='int', py_type=<class 'int'>, to_simple=None, from_simple=None)}

All the valid properties for this translator including extensions.

cameraPolicyFile = 'policy/lsstCamSim.yaml'

Path to policy file relative to obs_lsst root.

detectorMapping = None

Mapping of detector name to detector number and serial.

detectorSerials = None

Mapping of detector serial number to raft, number, and name.

name: str | None = 'LSSTCamSim'

Name of this translation class

Methods Documentation

classmethod can_translate(header, filename=None)

Indicate whether this translation class can translate the supplied header.

Parameters

headerdict-like

Header to convert to standardized form.

filenamestr, optional

Name of file being translated.

Returns

canbool

True if the header is recognized by this class. False otherwise.

classmethod fix_header(header, instrument, obsid, filename=None)

Fix Simulated LSSTCamSim headers.

Notes

Content will be added as needed.

Corrections are reported as debug level log messages.

See fix_header for details of the general process.

classmethod observing_date_to_offset(observing_date: Time) → TimeDelta | None

Return the offset to use when calculating the observing day.

Parameters

observing_dateastropy.time.Time

The date of the observation. Unused.

Returns

offsetastropy.time.TimeDelta

The offset to apply. During lab testing the offset is Pacific Time which can mean UTC-7 or UTC-8 depending on daylight savings. In Chile the offset is always UTC-12.

to_altaz_end() → Any

Return the AltAz for the end of the observation.

Base class implementation returns None. Subclasses should override if the value is known.

Returns

altazastropy.coordinates.AltAz or None

The AltAz for the end of the observation.

to_has_simulated_content() → Any

Boolean indicating whether any part of this observation was simulated.

Returns

translationbool

Translated property.

to_instrument() → Any

The instrument used to observe the exposure.

Returns

translationstr

Translated property.